. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Fig. 4. Pelvic girdles of southern African Rajoidea. a. Criiriraja parcomaculata; b. C. triangularis; c. C. rugosa (North Atlantic); d. Anacanthobatis marmoratus; e. A. americanus (North Atlantic). CLASPER STRUCTURE Although there are major differences in the siphon and clasper gland structure between Selachii and Batoidei (Leigh-Sharpe 1926; White 1937), it is the distal end of the clasper which is important in the systematics of lower taxa. Anatomical investigations on the claspers of European raj
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Fig. 4. Pelvic girdles of southern African Rajoidea. a. Criiriraja parcomaculata; b. C. triangularis; c. C. rugosa (North Atlantic); d. Anacanthobatis marmoratus; e. A. americanus (North Atlantic). CLASPER STRUCTURE Although there are major differences in the siphon and clasper gland structure between Selachii and Batoidei (Leigh-Sharpe 1926; White 1937), it is the distal end of the clasper which is important in the systematics of lower taxa. Anatomical investigations on the claspers of European raj ids have been made by Petri (1878), Jungersen (1899), Huber (1901), Leigh-Sharpe (1920-6) and Stehmann (1970), while Ishiyama (1958) and Ishiyama & Hubbs (1968) have made detailed studies of the structure and systematic significance of the organ in Japanese rajids. Hulley (1966, 1969) has described the clasper structure of several South African species, and although he has figured the external structure of the claspers in eastern South Atlantic species (1970), detailed comparative anatomical studies of these organs have not been Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original South African Museum. Cape Town : The Museum
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
